Journal of the Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회논문지)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
권호 표지

Investigation of pretilt generation by UV light irradiation during imidization of polyimide

폴리이미드 소성 시에 UV 광조사를 이용한 프리틸트 발생에 대한 연구

  • Published : 2000.01.01
Download PDF
⟨ Previous Next ⟩

Abstract

In this study, we investigated the pretilt angle generation and liquid crystal (LC) alignment by ultravi-olet (UV) light irradiation during imidization of polymide. The generated pretilt angle of nematic (N) LC by using the in-situ photo-alignment method was smaller than that of the conventional UV photo-alignment method. Also, generated pretilt angle of NLC tends to increase by annealing. In case of using the polymer(AL-3046), we found that the in-situ Uv photo-alignment method has higher thermal stability of LC alignment, but it has a disadvantage to control pretilt angle.

Keywords

References

  1. SID 97 The mechanism of pretilt generation on polarized ultraviolet light aligned polyimide film X. Wang;J. L. West
  2. SID 98 Polyimide films designed to produce high pretilt angles with a single linearly polarized UV exposure M. Nishikawa;B. Taheri;J. L. West
  3. SID 96 Liquid-crystal alignment by slantwise irradiation of non-polarized UV light on a polyimide layer T. Yamamoto;M. Hasegawa;H. Hatoh
  4. J. of KIEEME v.11 no.10 Pretilt angle generation and EO performance in NLC with polarized UV light irradiation on polyimide surface D.-S. Seo;J.-H. Lee;C.-H. Lee
  5. J. of KIEEME v.11 no.10 Pretilt angle generation of NLC and EO performance of photo-aligned TN-LCD using obliqued non-polarized UV light irradiation on polymer surface D.-S. Seo;J.-M. Han;D.-S. Park
  6. J. of KIEEME v.12 no.2 Generation of pretilt angle in NLC and EO characteristics of photo-aligned TN-LCD on soluble polyimide surface containing trifluoromethyl moieties D.-S. Seo;T.-G. Park
  7. Jpn. J. Appl. Phys. v.32 Surface-induced parallel alignment of liquid crystals by linearly polarized photopolymers M. Schadt;K. Schmitt;V. Kozinkov;V. Chigrinov
  8. Nature v.351 Surface-mediated alignment of nematic liquid crystals with polarized laser light W. M. Gibbons;P. J. Shannon;S.-T. Sun;B. J. Swelin
  9. Appl. Phys. Lett. v.73 A method for liquid crystal alignment using in situ ultraviolet exposure during imidization of polyimide J. H. Kim;B. R. Acharya;S. Kumar;K. R. Ha